Modern Wisdom #1066 - Dr Kathryn Paige Harden - The Genetics of Evil: Are People Born Bad?
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Mar 2, 2026 
Dr Kathryn Paige Harden, psychologist and behavioral geneticist at UT Austin, explores how biology, environment, and experience combine to shape antisocial behavior. She discusses a 4‑million‑person genetics study, evolutionary roots of aggression and risk‑taking, heritability of conduct problems, punishment and mitigation in courts, epigenetics and cash‑transfer experiments, embryo selection ethics, and modern mating signals.
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Genetic Explanations Can Increase Retributive Sentences
- Presenting genetic explanations to jurors often increases recommended sentences; people who believe violence is inherited recommend harsher punishment out of fear of recidivism.
- Environmental causes are judged more mitigating, while genetic attributions can paradoxically fuel retribution.
Use Biology To Temper Retributive Impulses
- Recognize retribution as an evolved cooperation-enforcement reward that releases dopamine when wrongdoers suffer, so it's psychologically powerful but potentially harmful.
- Use that awareness to design systems that satisfy justice needs without indulging costly, pleasure-driven punishment.
Norway's Measured Response To Mass Murder
- Harden contrasts Norway's response to Anders Breivik: maximum sentence was 21 years with humane prison conditions and reflection on societal corruption by indulging retribution.
- Norway balanced safety and recognition of the perpetrator's humanity rather than purely maximal retribution.
